Absolute monarchy or absolutism is a monarchical form of government in which the monarch has absolute power among his or her people.

constitutional monarch

Constitutional monarchy is a form of government in which a king or queen acts as Head of State.

Dictatorship

RULED BY A SINGLE PERSON WHO GAINED POWER THROUGH FORCE

Theocracy

RULED BY GOD OR HIGHER POWER

Oligarchy

RULED BY FEW

Anarchy

RULED BY NONE

Communism

a political theory derived from Karl Marx, advocating class war and leading to a society in which all property is publicly owned and each person works and is paid according to their abilities and needs.